Sighting rib for firearms



April 27 1926.

B. S. MINTO$H SIGHTING RIB FOR FIREARMS Filed August 22. 1922 INVENTOR. QM/QM 7M QV/MM Patented Apr. 27, 1926.

UNETE STATES FATENT GFFECE BRADLEY S. MGINTOSH, OF BARNEVELD, NEW YORK.

SIGHTING RIB FOR FIREARMS.

Application filed August 22, 1922.

To all whom it may concern:

Be it known that'I, BRADLEY S. MoIN'rosH, a citizen of the United States, residing at Barneveld, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Sighting Ribs for Firearms, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to a sighting rib for firearms, and I declare the following to be a full, clear, concise, and exact description thereof suflicient to enable anyone skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings in which like reference characters refer to like parts throughout the specification.

. The object of the invention is to provide a device that can be demountably attached to the barrel of any firearm, without altering the parts thereof, whereby to aid in sighting said firearm. The rib is made demountable in order that it might be attached to any firearm, the old as well as the new, and, thereby, effect an economy in equipping such firearms with this new feature. Moreover, the rib is attached in such manner that it will allow for the normal expansion and contraction of the barrel of the firearm due to variation in temperature without affecting the efiiciency of the rib.

Another object is to break up the reflection of the rays of light that come in contact with the top surface of the rib, whereby to aid in clearing the vision for sighting the gun.

Furthermore, the rib is adapted to beheld in perfect alinement and against lateral displacement relative to the barrel of the gun, whereby to aid also in sighting the gun. The object will be understood by referring to the drawings in which:

Fig. 1 is a side elevation of a firearm, showing the rib attached;

Fig. 2 is an enlarged detail view, showing a perspective of the rib;

Fig. 3 is a detail View of a screw bolt used;

Fig. 4 is a transverse section taken on the line 4, 4 of Fig. 5;

Fig. 5 is an enlarged detail view, showing a fragment of the rib, with a split ring attached thereto;

Fig. 6 is a detail perspective view, showing Serial No. 583,638.

a perspective of the front end of the rib looking at the under side thereof, parts being broken away;

Fig. 7 is a transverse section of the rib taken on the line 7-7 of Fig. 8, and looking in the direction of the arrows;

Fig. 8 is a side elevation of the front end of the rib, and immediate part, said rib being broken away.

Referring more particularly to the drawings, an ordinary firearm of any well known construction is represented by 1. It has a barrel 2. A rib 3, which constitutes the novel feature of the invention is attached in a demountable manner to said barrel 2. The under surface of rib 3 has riveted thereto a plurality of studs 4, disposed at suitable intervals along said rib. A sector shaped bridge or web 5 is permanently attached to the lower end of each of the studs 4. The lower surface of webs 5 is curved to conform to the curvature of barrel 2. It is adapted to rest in a loose manner on the upper surface of said barrel 2, whereby to aid in supporting said rib 3, and yet to allow for the expansion and contraction of said barrel 2.

A ring 6 is brazed or otherwise permanently secured to the end of rib 3 and is adapted to fit in a loose manner over the end of barrel 2, whereby to aid in holding said rib in assembled posit-ion upon said barrel 2. The opposite end of rib 3 is attached to the part 10 of the gun by a screw 11.

The front end of rib 3 is enlarged at 12. The enlarged part 12 is equipped with an open elongated slot 15. The lateral sides of slot 15 are concaved, whereby to engage and retain therein the curved surface of the front sight 16 of any firearm. Such an engagement of sight 16, although allowing longitudinal movement will hold rib 3 against vertical displacement at the front end.

Rib 3 is recessed adjacent its longitudinal middle part and has formed thereat a depending flange 17 having an enlarged recess 18 for the projection of a bolt 20. Bolt 20 is enlarged at 21. Said enlarged part 21 is equipped with screw threads adapted to fit corresponding internal threads formed in one of the two upstanding members 22 of split ring or locking clip 23. The lower ends 24, 24 of ring 23 are beveled at 24 to clear the heads of screws25, 25 and are adapted to abut against block 26 that is attached to the lower side of barrel 2, whereby to aid in holding said split ring 23 and rib 3 attached thereto, from lateral displacement, relative to barrel 2. v

Although bolt 20 is screw threaded to one upstanding member 22, it abuts against the inner surface of the other member 22, whereby to force the lower ends 24 of ring 23 to wards each other and'against the opposite faces of block 26, attached to the firearm, to aid in holding said ring 23 in place, and, therefore, rib 3, that is attached to said ring 23 in direct alinement with barrel 2.

The top surface of rib 3 is serrated or corrugated, as at 30, whereby to break up the reflection of the rays of light that strike said top surface, and, thereby, aid in clearing the vision for sighting'purposes.

Moreover, beads or sighting-members 31 and 32 are attached to the top surface of rib 3, to aid in sighting the firearm. r V In operation, the rib 3 can be attached to any firearm by first engaging split ring 23 upon the barrel 2 adjacent block 26 and then engaging ring 6 with the frontend of said barrel 2 and also slot 15 made in the under side of rib 3 with the front sight 16 of the 7 Having thus described my invention What I claim as new and desire to secure by Letters Patent 1s:

1. In a detachablesighting rib for firearms, an elongated rib member, means secured at spaced intervals to and along said' means passing thru said opening and en-.

gaging said lugs whereby the ring may be clamped to the barrel.

2. In a detachable sighting rib for firearms, an elongated rib member, meanssecured at spaced intervals to and along said rib for engaging and supporting said rib on a gun barrel, said rib having at least one depending flange with-atransverse opening therethrough, and means for securing said rib to the barrel comprising a split ring adapted to encircle the same and having spaced lugs on its periphery, and screw means passing thru said opening threadedly, engagingone of said lugs and abutting the other, whereby the turning of said screw will force said lugs apart to clamp said ring to thebarrel. In testimony whereof I have affixed my signature. I

BRADLEY S. MGINTOSH. 

